554 



INDEX. 



Polygonum 



laxum, 345 



littorale, 346 



maculatum (sub-sp.), 

 345 



maritimum, 346 



minus, 346 



mite, 345 



nodosum, 345 



Persicaria, 345 



Raii, 346 



Roberti (sub-sp.), 346 



viviparum, 344 

 Polypodium, 518 



alpestre, 519 



calcareum, 519 



cambricum, 51S 



Dryopteris, 519 



flexile, 519 



Phegopteris, 519 



Robertianum (sub-sp.), 

 5]9 



vulgare, 518 

 Polypody, 518 

 Polypogon, 478 



littoralis, 478 



monspeliensis, 478 

 Pond-weed, horned, 437 

 Poor man's weatherglass, 



265 

 Poplar, 369 



black, 370 



grey, 369 



white, 369 

 Poppy, 17 



horned, 18 



Welsh, 18 

 Populus, 369 



alba, 369 



nigra, 370 



canescens (sub-sp), 

 369 



tremula, 369 

 Portulacefe, 69 

 Potamogeton, 430 



acinninatus, 433 



acutifolins, 435 



compressus, 434, 435 



crispus, 434 



cusjndatus, 434 



deeipiens (sub-sp.), 433 



densus, 434 



filiforniis, 436 



flabellatus (sub-sp.), 436 



fluitans, 431 



Friesii (sub-sp.), 435 



gracilis, 535 



gracilis, 435 



gramineus, 432, 435 



Griffithii, 433 



hcterophyllus, 482 



juncifolius, 436 



Potamogeton 



Kirkii, 535 



lanceolatus, 432 



lithuanicus, 433 



Lonchites, 432 



longifolius, 433 



lucens, 432 



marinus, 436 



mucronatus, 435 



uatans, 431 



nitens (sub-sp.), 432 



oblongus, 431 



obtusifolius, 435 



pectinatus, 4S6 



perfoliatus, 434 



plantagineus, 431 



polygonifolios, 431 



praelongus, 433 



pusillus, 435 



ri.fescens, 431 



salicifolius, 433 



serratus, 434 



sparganifolius, 535 



spathulatm, 432 



trichoides, 436 



Zizii (sub-sp.), 433 



zosterifolius, 434 

 Potentilla, 123 



alba, 530 



alpestris, 125 



anserina, 125 



argentea, 126 



aurea, 125 



Comarum, 124 



Fragariastrum, 126. 



fruticosa, 123 



maculata, 125 



mixta, 125 



nemoralis, 125 



norvegica, 126 



opaca, 530 



procumbens (sub-sp.), 125 



procumbens, 124 



reptans, 125 



rupestris, 126 



salisburgensis, 125 



Sibbaldi, 124 



Tormentira, 124 



trident ata, 530 



verna, 125 

 Poterium, 128 



muricatum, 129 



officinale, 129 



Sanguisorba, 12> 

 Prenanthes muralis, 241 



purpurea, 532 

 Prickwood, 187 

 Primrose, 260 



bird's-eye, 262 



evening, 158 

 Primula, 261 



acaulis, 261 



Primula 



elatior, 261 



farinosa, 262 



officinalis, 261 



scotica, 262 



variabilis, 261 



veris, 261 



vulgaris, 261 

 Primulacese, 261 

 Privet. 267 

 Prunella vulgaris, 323 

 Prunus, 114 



Avium, 115 



Cerasus, 115 



communis, 114 



domestica (sub-sp ), 

 115 



insititia (sub-sp ), 

 115 



Padus, 115 



spinosa, 115 

 Ps-amma 



arenaria, 481 



baltica, 481 

 Pseudathyrium alpesire, 



519 

 Pteris, 500 



aquilina. 500 

 Pulicaria, 207 



dysenterica, 207 



vulgaris, 207 

 Pulmonaria, 279 



angustifolia. 280 



officinalis, 280 

 Purslane, sea, 65 



water, 154 

 Pyre thrum, 213 

 Pyrola, 255 



arenaria, 2S6 



maritima, 258 



media, 255 



minor. 255 



rotund'folia. 256 



secunda, 256 



uniflora, 256 

 Pyrus, 135 



acerba, 136 



Achras, 135 



Aria, 136 



Aucuparia, 136 



Briggsii, 135 



communis, 135 



cordata, 135 



domestica, 5S1 



germanica, 1S7 



latifolia (sub-sp.), 136 



Mains, 135 



pinnatifida, 136 



Pyraster, 135 



rupicola, 136 



scanriioa (sub-sp.), 136 



tonninalis, 13o 



